Grids and Colors Measurement and Units Map Comments
Each map has comments you can use for your own notes. To view or edit the comments of your map, use File | Properties or press Alt+Enter. Then click on the Comments tab). You can use comments for describing:
Ø The original source of your map.
Ø Any special features or conventions you've used.
Ø The time or era of the map.
Ø Details that remain to be finished.
Ø The author and/or copyright information.